65421781520

素因数分解:

$2^4\times 5^1\times {\mathrm{817772269}}^1$

素因数の和:817772282

約数の個数: 20

約数和(自身を含む): 152105642220

約数和(自身を除く): 86683860700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 817772269, 1635544538, 3271089076, 4088861345, 6542178152, 8177722690, 13084356304, 16355445380, 32710890760, 65421781520]

約数ペア:

[(1, 65421781520), (2, 32710890760), (4, 16355445380), (5, 13084356304), (8, 8177722690), (10, 6542178152), (16, 4088861345), (20, 3271089076), (40, 1635544538), (80, 817772269)]